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GEORGE W. yBROWNEI OF BROOKLYN, `NEW YORK.

Letters Patent No.. 74,296, dated February 11, 1868.

IMPROVEMENT IN now-Locks.

@its Stimuli nient itin itis ettets patent Amit making piatti tlge same.

TO ALL WHOM ITv MAY CONCERN: p

Be it known that I, GEORGE W. BROWNE,of the city of Brooklyn, inthe county of Kings, and Stato of New York, have invented a'new and useful Improvement'in Row-Locks, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of'this specilication, in which- Figure 1 is a vertical cross-section,

Figure 2 a side elevation,

Figure 3 a plan and section of the lock base-plate, and

Figure 4 a plan and section of -the eccentric- Similar letters of'reference indicating corresponding parts.

The na'ture of my invention relates more particularly to an improvement in a row-lock, for whiehI hold Letters Patent of the United States, bearing date April 30, 1867, and numbered 64,280, and having-in view a more reliable attachment between the gunwale of the boat and the row-lock than is obtained bythe form manufactured under the patent mentioned above, in which I stated that the weight and action of the oars would be suiiicicnt to adjust and hold the row-lock in its proper position on the upper `edge of the gunwale of the boat. Extensive experiment and daily use since that time have 4demonstrated that while the foregoing claim was, in the main, correct, nevertheless, at the two extreme points of the stroke or sweep of the oars, the angularity of their action, and the decrease of the direct Weight consequent thereon, tended to draw the row-lock inboard,

' thereby unshipping the oars at the end of each stroke. The object of my present invention is to prevent this action, and I will proceed to describe theconstruction and operation of the arrangement, which I-have found ,to answer every requirement, thereby enabling others skilled in the lartto make and use my invention, as herein set forth. i i

A represents the thole-pin, centrally pivoted and sfwivelling in the boss-plate B, and passing through and retained in its place by the collar on the eccentric, D, to which 4it is permanently secured by the transverse-pin a. The boss-plate B, with the attached thole-pin, is connected to the lock base-plate C by a hinge and pin, E, thereby enabling the plate B and thole-pin A-to be wholly removed from the boat, or, when required, to fall iuboard, as shown by the red lines in tig. 1. This falling inboard, however, cannot take place unless the thole-pin A, with the attached eccentric, D, is brought into a position at right angles with the gunwale, or, in

` other words, is made to .describe a quadrant in the boss on the plate I3, thereby removing the end ofthe eccenfC, as herein described.

tric, D, from under the outer edge of the plate C, as showndnore particularly at C D,1'ig. 1l When this position is attained, the thole-pin and eccentric easily pass through the opening b in tle lock base-plate C, as shown in iig. 3. The lock base-plate C is mortsed into and secured -to the gunwale by boltsor screws, as shown at X, figs. 2 and 3. .i y Y i Inasmuch as the eccentric, D, is rigidly secured to the thole-pin A, it` will be readily secu that it will follow the tholepin Athroughout that portion of a revolution which the sweep of the oars describe, while at the same time the end, D', will remain under the outer edge of the plate C, as vseen at C, thereby preventing thc tendcncy of the thole-pin and plate B to fall inboard, as previously described; and this result will obtain until the thole-pin .is brought into the position at right angles with the gunwale, as heretofore set forth, when the whole arrangement will fall inboard, the eccentric, D,lpassing readily through the opening?)` in the lock base-plate" What I claim as my invention, and desire to secure by LettersPatent, isi i The plateC and eccentric, Dtwhen combined and `operated in 'the manner and for the purpose described.

` GEO. W. BnoWNE.

Witnesses:

G. H. SELLERS,

PETER W. Knnrr. 

